Turret-tool holder



Feb. 25, 1930. W, A HYATT 1,748,348

TURRET TOOL HOLDER Filed Feb. 27, 1928 Patemed Feb. 25, 193e f l.UNITED- STATES PATENT oFFlcE WILLIAM A. HYATT, OEDENVER, coLoRADo TURRET-TOOL HOLDER Application led February 27, 1928. Serial No.7257,195.

` "This invention relates toimprovements in u,compound tool post for lathes and has for its object the production of a tool postl that shall be so constructed that a plurality of tools can .5 beattached to it and properly adjusted so as to `perform diderent operations on an article which is being turned and which'tools can be readily shifted so as to put them intoy opera tive-position.

e 1,0 Itis well known that ywhere articles are to vever,veryexpensive and' therefore are not available to everybody. K It is the object of this invent-ion to pro- 'duee a tool post thatshall be so constructed that'i'tcan be rotate'd'through an angle 'of forty-'live or an angle of ninety degrees and y'which shall have attached to it a number'of `separate tools, which can be adjusted so as to beV infproper position to perform different structed. This tool post is made very strong V a'nd'soattached to the transverse' carriage that it-canbe quickly released for the pur- -pose of operation and quickly clamped in place andheld rigidly during the operation.v

3.5;By means .of a tool post such as will hereinafter be described, alarge amount of time can be saved as it removes the necessity of stopping they lathes forl the purpose of replacing or shifting the tools. v A In order to describe my invention with the greatest posible clearness sothat it kcan bey readilyunderstood, reference will be had ytothe accompanying'drawing in which they l.preferred embodiment Vthereof has been 45. .,shown and in which?) operations on the piece which is being con Fig. 1 is a top plan Viewy showing a portion of a lathe and showing my improved tool post attached to the cross compound;

Fig. 2 is a section taken on line 2 2, Fig. 1; Y

Fig. 3 is a section taken on line 3 3, Fig. 2; n i L Fig. 4 is a detail elevation taken in the direction of arrow 4, in Fig. 3; Fig.' 5 is a section taken on line 5 5, Fig.

, 2 r,and i Fg? 6 is a section taken on line 6 6, Fig. 3.

In the drawing numerals 1 kdesignates the guides with which the lathe is provided and 6o v2 the lathe carriage which is slidable on guides 1. Numeral 3 designates the chuck `and numeral 4 the cone pulleys with which the ordinary lathe is provided. The lathe carriage is provided with a longitudinal track 5 on which is slidably mounted a plate 6 to the under side ,ofwhich is connected a nut 7 with which the screw 8 is rotatively connected. The end of screw 8 is provided with a crank 9 by means of which it is rotated 70 so that the plate 6 may be moved longitudiynally of track 5 and transversely of the lathe bed. Secured to the upper surface of plate 6 is a member 10, which has a center opening for the reception of a pin 11 about which 75 it may be rotated. Suitable clamping means not shown is provided Afor holding plate 10 in any desired position. The upper surface of platev 10 is provided with a raised track 12 on which is slidablymounted themem- V ber 13. This ymember is provided withasc'rew 14 which is rotatively associated'with a nut 15, which forms part of member 16 and by means of which the latter member can be moved in the direction of the length P5 of screw 14. Screw 14 is provided with a handle 17 by means of which it can be rof tated. Member 16 has a flat upper surface andis provided with a transverse T slot 18 within which. is slidably located the base 19. P0

which the rod 22 is mounted to an'opening 25 in which is located a plug 26, whose up-y per end has its sides flattened in the manner indicated at 27 and projects above the upper surface of member 19 in the manner shown in Fig. 3. Plug 26 is connected with the rod 22 by means of an yarm 28 so' that whenever the rod 22 is moved, it will also move the pin. A spring 29 is secured to the under side of the head 19 by means of a screwy 30 and has its free end engaging the under surface 'of plug 26 so as to normally hold this plug and the rod 22 in the position shown in Fig. 3. A handle 31 isprovided at one end with two cams 32and a central cam 34. This handle is pivotally attached to the upper end of member 2O by means of a pin 33. Handle 31 is also provided with a. cam 34 which is located in the slot 23 and which is adapted to engage the upper end of rod k22 and force the latter downwardly against the action of spring 29 whenever the handle is moved into vertical position, but which will be spaced from the member 22 when the handle is in the position shown in Fig. 2. Rotatably mounted on member 20 is turret 35, which is provided with a central opening 36 for the lreception of member 20. The under surface of the turret block 35 is provided with radial slots 37 which are preferably spaced forty-five degreesl apart in the manner shown in Fig. 6. The flattened upper end 27 of pin 26 is adapted to engage these slots and to holdthe turret from rotation. Located washer 38.' The thickness of washer38 is such that whenvthe handle 31 ismovedto the position shown in Fig. 2,` that the cam surfaces 32 will engage the upper surface of this block and serve to clamp the turret block Vvfirmly against the upper surface of block l16.

IVhen handle 31 is moved to vertical position, cam 34 will serve to move pin 26 downwardly so as to release the turret block. and permit it to be rotated through any number of degreesy desired and after it has been rotated to the desired position, the handle is again moved to the position shown in Fig. 2 in which position cams 33 will clamp the parts so as to hold them rigidly` secure toeblock 16.

Referring now more particularly toFig. 5

y.it will beobserved that the turret block 35 is substantially square and is pioi'iided attach corner with a projection 41, which, in turn,

has aprojection 42 that extends at right angles to the projection 41'. Projection 42 has been shown in detail in Fig. 4 and is provided with a slot Whose lower surface is curvedon the arc of a circle in the manner indicated by reference numeral 43.

A segment' shaped Y block 44 rests on this curved surface and is adapted to serve as a support for thetool 45. Two clamping screws 46 extend through threaded openings in the lupper wall 47 of the projection 42 and engage the tool so as to.

firmly clamp it in adjusted position. In the embodiment illustrated, vthere areY four of these projections 42' Vfor each turret block, but byincreasing the size of the block, it may be possible to employ six or a greater number of these tool clamping projections.

From Fig. 3 it will be seen that theturret block 35 has'y been provided with an openingv 48, whose center is located below the upper surface of the turret block a distance somewhat less than the radius of theopening and therefore this Yopening extends a short dis- *y tance into the under surface of washer 38j y threaded sleeve 52 is secured. A short pin 53 extends between the end of threaded member 51 and the tool 50 and serves to hold the tool in adjusted position. n i

From the above description it will'be apparent that I have produced acompound tool post that is adapted to have vsecured to it a number of dierent tools which can be adjusted so as to perform a certain4 portion of an operation and since this tool post can be quickly rotated about the center of the pin 20, either one of these tools cankbe brought into operative position very quicklyand cani be securely clamped in position by means of the pin 26 and the cam action ofcams 32 on handle' 31.

Asy an ordinary lathe is provided with a part correspoiiding to'part 16 which hask 'a T slot 1,8 in which the ordinary tool post is se-v cured, it is evident that my compound tool post can be readily put into place by merely removing the ordinary tool post and replacing itV with my improved structure. In this wayrit is possible' to change any ordinary lathe so as to obtain a machine withwhich a as by means of `this simple tool post av number of tools can be properly adj'ustedan'd can V greater amount of work can be accomplished, y'

be brought into position very quickly' sl'o. V

that no time will, be waste'd'n changing tools as this operation, as now performed, is quite tedious, whereas 4with my improved compound tool post, Athe time now wasted in shifting tools can be almost entirely saved.

Having described the invention what is claimed as new is:

l. A compound tool post comprising a base having an upwardly extendingjournal, a turret block mounted for rotation about` the axis ofthe journal, said journal having an axial opening, the lowersurface of the turret block having a plurality of slots extending radially from the axis of rotation, the base having anvopening, a pin in the opening in the base, means comprising a spring for normallyholding the pin with its end projecting above the upper surface of the base, means comprisingv a rod extending through the .opening in thejournal for'moving the pin downwardly against the action of the spring, yand meanscomprising a cam pivoted to the upper end of the journal for forcing the turret block against the base.

2. A compound tool post comprising a base having anfupwardly extending tubular journal, said base having an opening spaced from the journal, a pin in said opening, a rod slidable inthe opening in the journal, means for interconnecting the rod and pin so that they move in unison, a spring secured to the base and engaging the interconnecting means, said spring being tensionedk to move the rod and pin upwardly, and means comprising acam pivotallysecuredto `the journal for moving the rod and pin downwardly against the tension of the spring. j

3. A'compound tool post comprising. a base having an upwardly extending tubular journal, said base having an opening spaced from the journal, a pin in said opening, a rod slidable in theopening in the journal, means for interconnecting said rod and pin so that they move'in unison, a spring secured to the base land 'engaging the interconnecting means, said lspring vbeing tensioned to move the pin upwardly, means comprising a cam secured to the journal for moving the rod and pin l, downwardly against the tension of the spring, a turret block rotatably secured to the journal,wthe under surface of said block resting i on the upper surface of the base, the turret fblock having its under surface provided VCe ybase yhaving an opening located to one sideL with -radial'grooves with which the pin can engage, and means eomprisng a cam for forcing the turret block towards the base.

4.' A tool post for lathes, comprising a base member lprovided with an upwardly extending tubular journal, the upper end of said journal having a diametrical notch, a cam located in the notch and pivotally attached to the journal, a rod slidable in the journal, said of the journal, a locking pin in the opening in the base, means for interconnecting the rod and pin so that the)7 will move in unison, v 

